This is a discussion on BOV question within the New Member Hangout forums, part of the Community - Meet other Enthusiasts category; i have a 02 wrx i want 2 get a aftermarket bov do i have to hace the ecu re ...

If you perform the intake silencer delete, you'll be able to hear the BPV discharge air into the intake.easiest way to make stock recirc bov louder
It might be the sound you're looking for without causing the rich condition for which VTA BOVs are famous.

Also... I know there's a huge topic on blowoff valves, but in short: Harmful or not? I read they could throw the CEL or cause extra fuel to be deposited into your muffler/exhaust line, but then I read, "No problems here!" I mean... you just have to love that P-TSH! sound.

Problems, not if it's adjusted properly. Maybe premature spark plug replacement but that's it. If it's not adjusted right, yes it will cause problems. But there are many reasons to not bother wasting your money on that junk. Aftermarket valves require setup and maintenance while the stock one does not. Also, loud VTA BoVs are extremely obnoxious and generally universally frowned upon by experienced people in the automotive world as nothing but a "hey look at me!" mod.

Also, the reason for the recirculation of air back into the intake in the 1st place is to help keep the turbo spinning in between shifts...

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